going from carby to MPFI

esray71 · Post by **esray71** » Thu Dec 06, 2007 11:04 pm

Anyone have an idea if it's difficult to go from carby to MPFI (EA82 94mdl L series Wagon) I'm not sure if they are difficult to wire up or the fuel system is much different? If anyone knows much about this i'd appreciate some advice.....or maybe just stick with the carby?? The motor needs a lot of work anyway.

Gremlins · Post by **Gremlins** » Fri Dec 07, 2007 12:19 pm

I would imagine a MPFI conversion would be similar to a turbo conversion, perhaps a little easier as you don't have to worry about things like different cross members, however it will still be a fair amount of work as there are heaps of things that you will need in addition to just the motor to make it work. eg. EFI Computer, EFI loom (which may involve having to remove the existing carby loom depending on how you do it), Airflow meter, Air filter box, Fuel Pump, and this is just a few things that come immediately to mind. Ideally you'd have a complete MPFI donor car or front cut so you have all the bits you need. Most people probably wouldn't recommend going to the effort or expense to convert a carb to MPFI (unless it's a Turbo MPFI) as the performance gains are minimal.

Post by **Alex** » Fri Dec 07, 2007 12:42 pm

may as well go EJ if your going through all the trouble. A BIG power increase. Do a search and youll find everything your after

alex

esray71 · Post by **esray71** » Fri Dec 07, 2007 4:57 pm

thanks for the replies guys!

I have a complete MPFI with a computer, cams look great and the motor has some small oil leaks. So i wanted to strip it and have a good look at the internals and replace what ever it needs, maybe just gasket set and cam belts and things. I got it for a fair price and it's complete. If it's too much trouble to connect everthing maybe i'll just do the block and reco my heads (they're stuffed) and carby then slap it together! I was thinking the MPFI probably needs an oxygen sensor in the exhaust?? maybe get the exhaust from wreckers? but i'm not sure how much wiring i need to do. Hoping that i might hear from some ppl that have done this or knows of someone that has done this or even ppl that have more of idea than i do.

YouTube · Post by **El_Freddo** » Sat Dec 08, 2007 1:10 am

Hey esray71,

I decided on doing this conversion before i found forum. In hindsight i'd do an EJ conversion, probabily the EJ20 cos it's legal in vic.

Bascially you'll need all the sensors to run the MPFI - oxy in exhaust, air flow metre and associated air box, the rest will be on the motor.

Easiest way to do the swap would be with the donor car's entire wiring loom and instrument cluster. This way you'll know it will all work with out any hastles of splicing in wiring. My L has 1991 MPFI wiring up to the back seat where i then spliced it in with the original wiring in the rear to avoid damaging my interior. I would have been easier to do the whole wiring loom in one piece - saves time and headaches of working out the splicing thing.

When going the EJ conversion the other things to consider are:
- radiator size and fitment (most go a custom job)
- adaptor plate for gearbox
- different enging mount angles - but not really a drama there apparently

Hope this is of some use.

Cheers

Bennie

schultzie · Post by **schultzie** » Sun Dec 09, 2007 4:36 pm

will the stock l series rad be fine witht eh na ej20 running it?

converting my dads l series soon

YouTube · Post by **El_Freddo** » Sun Dec 09, 2007 11:21 pm

schultzie wrote:will the stock l series rad be fine witht eh na ej20 running it?

converting my dads l series soon

Schultzie, the stock L radiator can't even handle the stock EA82 let alone a NA EJ20...

I'm going to try and shoehorne a MY radiator into the L, these are not replaced when an EJ is dropped into the old MY subi's...

I'll keep you updated as to how it goes and what has to be done...

Cheers

Bennie

AndrewT · Post by **AndrewT** » Sun Dec 09, 2007 11:31 pm

U can also get a dual core liberty core fitted into an L series frame, this is how most people upgrade them for EJ conversions, works pretty well.

esray71 · Post by **esray71** » Wed Dec 12, 2007 6:20 pm

thanks for the help and advice........i might just sell the MPFI heads and injectors....keep the block, rebuild it and reco my heads and carb?! I don't mind the carby engine and keeping it simple!

stamp_licker · Post by **stamp_licker** » Wed Dec 12, 2007 7:59 pm

schultzie wrote:will the stock l series rad be fine witht eh na ej20 running it?

converting my dads l series soon

I;ve been running a l series rad behind a ej22 for 12 months and its been fine.I've got one fan hooked up to a temp sender and a second fan out of a my hooked up to a switch which i turn on offroad.I have had no overheating probs.

esray71 · Post by **esray71** » Sun Dec 23, 2007 9:47 pm

my 94 L series EA82 engine temp stays around 1/3(the usual position) in traffic on a hot day with conditioner on, the 2nd fan helps a lot but i got to turn off the air con to get up the hill !

discopotato03 · Post by **discopotato03** » Mon Dec 24, 2007 6:29 am

stamp_licker wrote:I;ve been running a l series rad behind a ej22 for 12 months and its been fine.I've got one fan hooked up to a temp sender and a second fan out of a my hooked up to a switch which i turn on offroad.I have had no overheating probs.

I agree , with an EA82/T the problem isn't the radiator . Its generallly a tired cranky long in the tooth engine with cracking heads/aging head gaskets/lots of blow by which gets sucked back into the cylinders with the EA82's over exuberant crank case ventilation system . IF the engine is in reasonable condition inc rings water pump rad etc (and tune) the real issue is getting enough AIR through the core .

Two big enough elec fans will cool any EA82 in just about any state of tune as long as the std radiator/water pump/thermostat is in as new condition including rally spec turbo ones . At high mileage EA's have greater cooling demands but they can be catered for without major feats of reengineering .

Cheers A .

esray71 · Post by **esray71** » Sat Jan 05, 2008 8:06 pm

does anyone know of a wreckers that might have L series parts(Melbourne)?? I might look at getting the wiring and other bits and pieces to fit the MPFI and maybe get the exhaust with the oxygen sensor rather than modify mine.

YouTube · Post by **El_Freddo** » Sun Jan 06, 2008 1:18 am

GTLegs told me that there was an MPFI L at Kilsyth pic a part last weekend... Dunno how complete it is now though.

My piece of advice after having done this conversion: Consider an EJ conversion, seriously. Otherwise strip car of every piece of wiring you can find, including everything that attaches to it. Take instrument cluster too so you know it all works. Get a new fuel pump ($170) that way you know it'll work as it should.

Grab EFI fuel lines and tank if you want. My car had a surging issue that was random. I think it may have been from the fuel pressure fluctuating in the lines under different circumstances - sometimes it wasn't there.

If you could just buy the whole car for $300 or so you'd come out laughing...

I know i may be regurgitating some of this info...

Cheers

Bennie

schultzie · Post by **schultzie** » Sun Jan 06, 2008 6:46 am

if it is the same one i seen it is missing a little bit and it is definalty missing one injector
i pilfered from a brown wagon

SUBYDAZZ · Post by **SUBYDAZZ** » Mon Jan 07, 2008 6:53 am

El_Freddo wrote:Schultzie, the stock L radiator can't even handle the stock EA82 let alone a NA EJ20...

Bah! They are fine if in good condition.

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going from carby to MPFI

going from carby to MPFI

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